The entries below are used to calculate the Battery A/H'sneeded based on your planned operation.

The entries below are used to calculate how longa Battery will deliver the desired A/H's.

Duration needed in Hours -

- Battery Amp/Hour Rating

Mode Duty Cycle -

- Depth of Discharge (%)

Operator Duty Cycle (%) -

Radio's Receive Current in Amps -

Note - All Percentages must be entered aswhole numbers without a "%" sign

Radio's Transmit Current in Amps -

Average Current Consumed -

- Usable Battery Amp/Hours

A/H Capacity Needed -

- Expected Battery duration in Hours***

A/H Capacity + Reserve -

* With WAĜITP and AB8XA mods of the original W1PNS Spreadsheet.** Presented at OzarkCon 2006 and Pacificon 2005.*** The greater the transmit draw is above the battery Ah Rating divided by 20, the lower the duration will actually be.